In this lecture, Prof. Long focused on the psychosocial significance of walls in the lives of three standout characters of the twenty-first century: the migrant, the Covid-19 survivor, and the conspiracy theorist. But he explored, also, the paradoxical utility of walls and how they allow us to think, to metabolize our own strangeness, and—hopefully—to find the Other. Here is the link to the lecture, with consecutive translation in French.